Archive files over HTTP now correctly handled
FTP Passive mode not turned on when entering an FTP URL in location text field
Fixed a bug in HTTP/HTML folders causing some files to be unaccessible
Fixed automatic folder refresh hogging CPU unnecessarily
Fixed a bug under Mac OS X which prevented preferences to be written when a preferences file from v0.5 was found

Known issues:

Slow TAR and Zip extraction for small files because extraction is not performed sequentially (yet)
Mac OS X-specific files not transferred properly
Image viewer doesn't free memory properly under Mac OS X
Folders cannot be renamed to upper/lower case variations of the same name
Pipe '|' and other shell operators cannot be used in 'Run Command'